Spells and abilities that cause players to gain life still resolve while Rampaging Ferocidon is on the battlefield
There has been one of these types of sets for each generation since (up through SV so far) - Shiny (Baby Shiny) - Shiny Super Rare (Shiny Full Art) Throughout all 3 iterations so far, they have commonly had a silvery-textured background in the picture box behind the Pokemon
putting lore counters on a saga does not use the stack
These didn't have to be built with Standard in mind, and they have their own expansion symbol to set them apart
The way they're played is to stall with Chansey while attaching a Fire Energy to Moltres every turn and then scooping Chansey up when it gets too much damage, using Wildfire, putting Chansey back down, scooping Moltres up, putting Chansey out, attaching Fire Energy to Moltres, etc